Olympic athletes have lower resting heart rates because...
Atheir lungs tend to be naturally larger.
Bthey exercise regularly, which improves the efficiency of their heart.
Cthey tend to eat low-fat diets.
Dthey have a lot of muscle mass due to weightlifting.
PLEASE HELPP!!!!!!
Atheir lungs tend to be naturally larger.
Bthey exercise regularly, which improves the efficiency of their heart.
Cthey tend to eat low-fat diets.
Dthey have a lot of muscle mass due to weightlifting.
